78610385249 has 24 divisors (see below), whose sum is σ = 90114988320. Its totient is φ = 67985976000.

The previous prime is 78610385239. The next prime is 78610385257. The reversal of 78610385249 is 94258301687.

It is not a de Polignac number, because 78610385249 - 2⁴ = 78610385233 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78610385249.

It is not an unprimeable number, because it can be changed into a prime (78610385239) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 560669 + ... + 686709.

It is an arithmetic number, because the mean of its divisors is an integer number (3754791180).

It is a 1-persistent number, because it is pandigital, but 2⋅78610385249 = 157220770498 is not.

Almost surely, 2^78610385249 is an apocalyptic number.

It is an amenable number.

78610385249 is a deficient number, since it is larger than the sum of its proper divisors (11504603071).

78610385249 is a wasteful number, since it uses less digits than its factorization.

78610385249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126173 (or 126142 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 78610385249 in words is "seventy-eight billion, six hundred ten million, three hundred eighty-five thousand, two hundred forty-nine".